Boring tool setting gauge



y 1945- A. H. TALBOT ET AL BORING TOOL SETTING GAUGE Filed Feb. 4; 1944 2 Sheets-Sheet 1 INVENTORS. 525550.61 T52 Ear W24 g May 8, 1945. A. H. TALBOT ETAL BORING TOOL'SETTING GAUGE Filed Feb. 4, 1944 2 Sheets-Sheet 2 turned to zero.

the indicator reads half the desired increase in l diameter.

- conical hub 46.

the difference-between the diameter of the bar and thediameter of the hole to be bored. The

' device is then slid along the bar until the plunger '52! isfdire'ctly over the tool, and the tool is advanced against the plunger until the indicator jreads .125. The tool is now in position for cut- :ting, assuming that the hole has already been rough-bored andfis prepared to take the final out. 3 "I 1 The device can also be used where a hol of tool tip with a slighttension, and the dial is The tool is then advanced until Other uses of the;device will readily be sug- -gested to' those skilled in the art. For easy handling of the device, the outer surfaces of. rails 5 are concentric and knurled; and the outer v surfaces 36 of the shoes ar convex in the same cylindrical surface. I

In the modification shown in Figures 5, 6 and 7, there is provided a base 40 on which is mounted a cylinder 4| having opposed longitudinal slots 42. g" In the cylinder is slidably mounted a cylindrical sleeve 43 closed at its upper end and in which is fitted, transversely, a collet assembly 44 substantially identical with that previously described and extending through one of the slots 42. j

' On the upper end of the cylinder 4| is screwed 3a cup 45 having an upwardly extending tapped Through the hub is threaded an :adjustin'g' screw 41 having a blank lower end 48 :rotatably mounted in the top of the sleeve 43,

iand formed with afiange 49 resting upon'the sleeve. The lower: extremity of the screw, with- ;in the sleeve 43, is threaded at 50 to receive a inut 5! with a screwdriver slot 5| for supporting a retaining washer 52 that bears against the top 48 of the sleeve, thereby mounting. the screw irotatabiy in the sleeve. on the cap 45 and is formed; with a'conical recess f5 l receiving the hub 46. By screwing the nut down on the hub 46, which is slotted to form a gcollet, the screw is locked inits adjusted position. .This device, comprised of the nut and the hub,

' jreplaces the set screw 1 of the previously described construction. A knurled head 55 is fasjtened on the external end of the screw 41 by a pin 56. I This modification .of the gauge is capable of iall 'thel'usesof the previously described construction. In. the use of either construction ithere may be a condition where the cutting tool extends throughthe boring bar a distance that lis beyond the range of the indicator. For this condition there. is provided .a series of riser 1blocks, one'ofwhich is shown in Figure 8;

1 Each suchkblock fill-isformed with a tapered "end (ii/shaped to-fit accurately in the V-groove =offthe base 4 or 40. The:opposite end of the 1 griserblock 69 ,is formed with a V-groove 64 adapted to seat on the boring bar in the manner previously described. The riser block is secured ito thegbase4fl by a screw 65 entering a tapered hole .66 in the bottom of cylinder 4|.

The riser block 5!} is wider across the V than ;the base 40 and is therefore adaptedfor a larger boring barJQAriSerblock used ionlyfor height need not be substantially wider than the base ?40 and may terminate at the shoulders 61. y

Having thusfully; disclosed our invention,

known diameter has already been bored by the jtool 2 and is to be enlarged a known amount. 1

The indicator is adjusted so that it engages the A look nut 53 is screwed stantially parallel relation what we claim and desire to secure by Letters Patent is:

1. A gauge of the character described com- I prising an elongated body having one end shaped to'seat on a boring bar a slide mounted in said body to move lengthwise thereof to varying dis tancesfrom said end, a screw threaded lengthwise in said body and having one 'end'mounted in'said slide, and means carried by said slide for supporting a dial indicator.

2. A gauge of the character described comprise ing an elongated body having one end shaped to seat on a boring bar a slide mounted in said body to move lengthwise thereof to varying distances from said end, a screw threaded lengthwise in said body and having one end mounted in said slide, means'for locking. said screw to said body, and means carried by said-slide for supporting a dial indicator. I

' 3. A gauge of the character described comprising an elongated body having one end shaped to seat on a boring bar a-slide mounted in said body to move lengthwise thereof to varying distances fromsald end, a screw threaded lengthwise in said body and having one end mounted in said slide, a dial indicator carried by said slideqand ing a longitudinal opening through which said 1 collet extends.

5. A gauge of the character described coniprising an elongated body having one end shaped to seat'ona boring bar a slide mounted in said body to move lengthwise thereof to varying'distances fromsaid, end, means for adjusting said slide inrsaid body, and a collet mounted insaid slidetransversely'of said body, said body having a longitudinal opening through'which'said collet extends,a dial indicator supportedby said collet externally of said body, and a measuring plunger extending from said indicator infsubstantially parallel relation tothe axis of said body:

' 6.=A gauge of the character'described comprising an elongated body having one end shaped to seat on a boring bar,'f'a.slide mounted in said body to move lengthwise thereof to Va1'ying distances from 'said end, means for adjusting said slide in said body, a nut'a't one end of said body,a screw threaded in said nut and having one end mounted insaid s1ide, and a lock nut applied to the first named nut. H f;

"7. A gauge of the character described com prising an elongated bodyhaving one end shaped. to seat on .a' boring bar, aslidefmounted in; said body to move lengthwise thereof to varying distancesfrom said end, means for adjusting said Slide in said body, a nut at one endfof said; body, ascrew threadedinsaid nut and having one end mounted" in s'aidslide, a cone-projecting from said nut and receiving said screw,- and a lock nut screwed on the first nut'and having a conical recess'receiving said cone HARRY H. KRO'H. A l 

